01OverviewDefinition, clinical context and the essential points that orientate the chapter.
Age-related hearing loss, often called presbycusis, is a gradual sensory impairment associated with changes in the cochlea and auditory pathway. Higher-frequency information is often affected early. A person may hear that someone is speaking but struggle to identify the words, particularly when several people talk at once. Families may notice raised television volume or repeated requests for clarification before the patient identifies a hearing problem.
Noise-related loss overlaps with ageing in many adults. Ask about the actual tasks and sound exposures in each job, not only the occupation's title. Include machinery, impact noise, military service, amplified music, shooting and other recreational activity. The intensity, duration and repetition of exposure all matter. A history of muffled hearing or tinnitus after noise is evidence that the exposure deserves attention even when the symptoms subsequently settle.
Both processes can contribute to a bilateral sensorineural audiogram, but neither should become a convenient explanation for every deficit in an older or noise-exposed person. Establish symmetry and progression, look for a conductive component and ask about unilateral tinnitus, vertigo and neurological symptoms. A hearing aid addresses disability; it does not remove the need to investigate a pattern suggesting another disease.
Management combines support for the impairment already present with prevention of further avoidable injury. The person's goals may include following a grandchild's speech, hearing a monitor at work or participating in meetings without excessive effort. These priorities should shape assessment and rehabilitation. An audiometric descriptor such as mild or moderate summarises thresholds but cannot measure the effect of room acoustics, competing speech, fatigue or the importance of a particular listening task.
Key points
- Age-related loss usually develops gradually and often affects higher-frequency hearing early, making speech less clear despite audible voices.
- Noise exposure may contribute over years or cause immediate injury after an extreme event; permanent damage cannot be reversed by simply resting the ear.
- Obtain a lifetime occupational and recreational exposure history alongside otoscopy and formal audiometry.
- Offer hearing support according to functional need, including hearing aids when hearing loss affects communication or awareness of important sounds.
- For Great Britain, HSE specifies lower and upper daily or weekly action values of 80 and 85 dB(A), with a limit value of 87 dB(A) that accounts for hearing protection.
- Reduce noise at source and through safer work methods; protective equipment and surveillance complement these measures.
02AetiologyUnderlying causes, associations and risk factors, with why each one matters.
Age-associated sensory change
Age-related impairment reflects changes in cochlear and auditory function, with substantial variation between individuals. Its gradual course often allows compensatory habits to develop before the person recognises a clear hearing problem.
Occupational and recreational noise
Repeated excessive sound exposure can damage hearing progressively, while a very intense event can cause immediate injury. Workplace noise and non-work activities may both contribute, so a complete exposure history is more useful than a single job label.
Combined lifetime influences
Ageing, noise and other ototoxic or ear-disease exposures can coexist. A clinician should avoid assigning all impairment to one factor without considering the audiogram, temporal pattern and relevant medical history.
03PathophysiologyThe causal sequence from the underlying abnormality to symptoms and harm.
- 1Loss of cochlear sensory function
Damage to cochlear hair cells and related auditory structures reduces sensitivity and the quality of transmitted information. This can affect air and bone thresholds together while leaving a normal-looking canal and drum.
- 2Reduced access to speech detail
High-frequency impairment can make important consonant cues harder to distinguish. A louder voice is therefore not always a clearer one, especially when noise competes with speech or the speaker's face cannot be seen.
- 3Temporary change as a warning
Hearing may appear muffled after noise and later recover, but repeated hazardous exposure can produce permanent impairment. Improvement after a noisy shift should not be interpreted as evidence that continuing the exposure is harmless.
04Clinical features and red flagsSymptoms, examination findings, patterns of presentation and time-critical warnings.
Ask about speech in groups, telephone use, television volume and whether familiar people seem to mumble. Gradual high-frequency difficulty supports an age-related pattern when the remaining assessment is consistent, but functional impact varies greatly between people with similar measured thresholds.
Clarify the loudest tasks, how long they last, hearing-protection use and fit, and whether symptoms occur after exposure. Include current and previous employment and leisure activities. Do not assume that a brief task is safe when its intensity is extreme.
Rapid progression, marked asymmetry, persistent unilateral tinnitus, vertigo or an abnormal ear examination changes the diagnostic question. Even a long history of occupational noise does not establish that an unexpected new pattern is caused by noise.
Explore dexterity, vision, cognition, language, stigma, device comfort and practical access to services. Apparent disinterest may reflect an explanation the patient could not hear or an aid they cannot insert. Involve support people with the patient's agreement while continuing to address the patient directly.
05InvestigationsWhat to request, why it matters and how to interpret it.
Read from the initial assessment onwards. Tests may run in parallel in urgent care; first-line, preferred, confirmatory, definitive and gold-standard labels appear only when the chapter explicitly states them.
- 01
Otoscopy and clinical hearing assessmentFirst step - Why
- Identify reversible disease and determine whether the presentation is suitable for routine audiology.
- Interpretation and limitations
- Exclude important obstruction or acute infection and examine any abnormal membrane. Sudden or asymmetric presentations require their appropriate referral route rather than routine rehabilitation alone.
- 02
Pure-tone air and bone audiometry - Why
- Quantify impairment and identify its frequency pattern, symmetry and possible conductive component.
- Interpretation and limitations
- Use calibrated testing with masking where necessary. A bilateral high-frequency sensory pattern may be consistent with ageing or noise, but a chart alone cannot reliably allocate the relative contribution of each exposure. Compare reliable earlier measurements when available.
- 03
Functional and aided assessment - Why
- Understand practical disability and evaluate the benefit of a proposed hearing strategy.
- Interpretation and limitations
- Discuss communication goals and listening settings, with speech testing or other audiological measures when useful. The ability to hear tones in quiet should not be the sole basis for deciding whether hearing support is justified.
- 04
Occupational exposure assessment and surveillance - Why
- Identify ongoing risk and detect hearing changes that require action.
- Interpretation and limitations
- A competent occupational programme combines exposure assessment with controlled hearing checks and clinical interpretation. HSE recommends surveillance for workers regularly above the upper action values or otherwise at risk, including those with existing hearing impairment.
06Differential diagnosisRealistic alternatives and the features that help distinguish them.
A superimposed conductive disorder
Wax, fluid, perforation or another middle-ear lesion can add to a longstanding sensory deficit. Identifying and treating that component may improve function even when the underlying age-related or noise-related loss remains.
An asymmetric neural or inner-ear disorder
A marked interaural difference, unexplained fluctuation or localising symptoms can indicate disease requiring ENT or audiovestibular investigation. Age and noise history do not invalidate the usual referral and MRI considerations.
Other causes of sensory impairment
Ototoxic medication, previous infection, inherited factors and neurological disease can contribute to adult hearing loss. Review chronology and exposure rather than assuming a high-frequency configuration proves a single cause.
07ManagementImmediate care, first-line treatment, alternatives and escalation.
01A gradual symmetrical sensory presentationOffer support based on the person's needsFirst stepAssessment is consistent with chronic age-related or noise-related impairment without a separate urgent feature.+
- 1Explain the findings and discuss hearing aids, communication tactics and assistive listening devices around the patient's chosen goals.
- 2Offer two aids when both ears have aidable loss, and teach device use and troubleshooting in an accessible way.
- 3PreferredArrange the NICE hearing-aid follow-up at six to 12 weeks, using face-to-face review or a preferred telephone or electronic approach, and address comfort, benefit and continuing barriers.
02Ongoing workplace noise riskReduce exposure before relying on equipment aloneThe history or occupational assessment identifies potentially hazardous work-related sound.+
- 1Request occupational-health and workplace risk assessment, considering quieter equipment, engineering controls and changes that reduce time exposed.
- 2Use HSE's Great Britain action levels appropriately: 80 and 85 dB(A) daily or weekly exposure, with peak action levels of 135 and 137 dB(C). The limits are 87 dB(A) and 140 dB(C), taking protection into account when assessing the limit.
- 3Provide suitable hearing protection, instruction and surveillance where indicated, and revise the control plan when results or work tasks show that risk persists.
03A concerning change or atypical resultInvestigate before attributing everything to ageingThe hearing pattern, examination or associated symptoms do not fit an uncomplicated gradual bilateral loss.+
- 1Characterise the change and arrange urgent or diagnostic ENT or audiovestibular referral according to onset and associated findings.
- 2Assess localising signs and sensorineural asymmetry against NICE MRI recommendations, and investigate a persistent conductive component or abnormal drum.
- 3Maintain communication support during the diagnostic process and ensure the patient knows how to obtain help if another abrupt change occurs.
08ComplicationsImportant consequences, why they occur and why they matter clinically.
Communication restriction
Difficulty understanding speech can reduce participation in work, relationships and healthcare decisions. Accessible communication, suitable aids and practical environmental changes can lessen this burden even when normal hearing cannot be restored.
Tinnitus and listening fatigue
Persistent internal noise and the effort of following conversation can affect concentration and sleep. Ask about distress and daily impact, and arrange appropriate audiological or further clinical support rather than addressing thresholds alone.
Missed warnings and further injury
Hearing impairment and a noisy environment can make alarms or instructions harder to detect. Occupational assessment must consider safe communication as well as reducing noise, particularly when hearing protection changes audibility.
09Monitoring and follow-upTreatment response, safety checks and longer-term review.
- Review hearing-aid benefit against the agreed daily goals, and reassess difficulties with fit, handling, background noise or telephone use.
- Repeat audiological assessment according to changing needs and the service recall plan, with earlier review for a new clinical change.
- For occupational surveillance, HSE describes baseline testing, usually annual checks during the first two years and then three-yearly checks, with more frequent assessment when risk or findings justify it.
- Use surveillance outcomes to inform occupational-health advice and workplace exposure control rather than simply filing another audiogram.
- Ask about tinnitus, distress and participation, and ensure information and safety instructions remain accessible as hearing changes.
10Special situationsVariants, exceptions and circumstances that change the usual approach.
Protection is not a substitute for quieter work
HSE places control of noise exposure at the centre of prevention. Ear defenders or plugs depend on appropriate selection and consistent correct use. Quieter machinery, maintenance, separation from the source and shorter exposure can reduce reliance on individual behaviour while improving the listening environment.
The limit is different from an action value
Action values trigger preventive duties before the maximum permitted exposure is reached. The 87 dB(A) limit takes account of protection, whereas an unprotected exposure at an action level still requires the relevant assessment and control measures. Avoid presenting the limit as a target that every worker should approach.
Cognitive concerns need accessible hearing assessment
NICE advises considering audiological assessment for adults with suspected or diagnosed dementia or mild cognitive impairment. Difficulty hearing can complicate communication during cognitive evaluation. Assess and support both issues appropriately without promising that a hearing aid will prevent or reverse dementia.
Lifestyle advice should be specific
Ask where avoidable sound exposure occurs and discuss lower levels, shorter duration, distance and suitable protection when needed. General advice to rest the ears is insufficient if the person returns to the same hazardous task. Hearing rehabilitation and prevention address different parts of the problem.
11Common pitfallsFrequent interpretation and management errors.
- 01
Explaining an abrupt or asymmetric loss as ageing simply because the patient is older.
- 02
Assuming recovery after temporary muffling means the noise exposure was safe.
- 03
Using an audiometric average alone to decide that a patient does not need hearing support.
- 04
Providing hearing protectors without addressing excessive noise at source or teaching correct use.
- 05
Collecting occupational audiograms without acting on deterioration or reviewing workplace controls.